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Journal article
The BTSbot-nearby Discovery of SN 2024jlf: Rapid, Autonomous Follow-up Probes Interaction in an 18.5 Mpc Type IIP Supernova
The Astrophysical journal, v 985(2), 241
29 May 2025
Abstract
We present observations of the Type IIP supernova (SN) SN 2024jlf, including spectroscopy beginning just 0.7 days (similar to 17 hr) after first light. Rapid follow-up was enabled by the new BTSbot-nearby program, which involves autonomously triggering target-of-opportunity requests for new transients in Zwicky Transient Facility data that are coincident with nearby (D < 60 Mpc) galaxies and identified by the BTSbot machine learning model. Early photometry and nondetections shortly prior to first light show that SN 2024jlf initially brightened by >4 mag day(-1), quicker than similar to 90% of Type II SNe. Early spectra reveal weak flash ionization features: narrow, short-lived (1.3 < tau[days] < 1.8) emission lines of H alpha, He ii, and C iv. Assuming a wind velocity of v(w) = 50 km s(-1), these properties indicate that the red supergiant progenitor exhibited enhanced mass loss in the last year before explosion. We constrain the mass-loss rate to 10(-4)<M-center dot[M(circle dot)yr(-1)]<10(-3) by matching observations to model grids from two independent radiative hydrodynamics codes. BTSbot-nearby automation minimizes spectroscopic follow-up latency, enabling the observation of ephemeral early-time phenomena exhibited by transients.
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Details
- Title
- The BTSbot-nearby Discovery of SN 2024jlf: Rapid, Autonomous Follow-up Probes Interaction in an 18.5 Mpc Type IIP Supernova
- Creators
- Nabeel Rehemtulla - Northwestern UniversityW. V. Jacobson-Galán - California Institute of TechnologyAvinash Singh - Stockholm UniversityAdam A. Miller - Northwestern UniversityCharles D. Kilpatrick - California Institute of TechnologyK-Ryan Hinds - Liverpool John Moores UniversityChang Liu - Northwestern UniversitySteve Schulze - California Institute of TechnologyJesper Sollerman - Stockholm UniversityTheophile Jegou du Laz - California Institute of TechnologyTomás Ahumada - California Institute of TechnologyKatie Auchettl - University of MelbourneS. J. Brennan - Stockholm UniversityMichael W. Coughlin - University of MinnesotaChristoffer Fremling - California Institute of TechnologyAnjasha Gangopadhyay - Stockholm UniversityDaniel A. Perley - Liverpool John Moores UniversityNikolaus Z. Prusinski - California Institute of TechnologyJosiah Purdum - California Institute of TechnologyYu-Jing Qin - California Institute of TechnologySara Romagnoli - University of MelbourneJennifer Shi - University of MelbourneJacob L. Wise - Liverpool John Moores UniversityTracy X. Chen - California Institute of TechnologySteven L. Groom - California Institute of TechnologyDavid O. Jones - University of Hawaii at HiloMansi M. Kasliwal - California Institute of TechnologyRoger Smith - California Institute of TechnologyNiharika Sravan - Drexel UniversityShrinivas R. Kulkarni - California Institute of Technology
- Publication Details
- The Astrophysical journal, v 985(2), 241
- Publisher
- The American Astronomical Society
- Number of pages
- 17
- Grant note
- PHY-2117997 / National Science Foundation (NSF) (https://doi.org/10.13039/100000001) AST-2429450 / National Science Foundation (NSF) (https://doi.org/10.13039/100000001) AST-1909796 / National Science Foundation (NSF) (https://doi.org/10.13039/100000001) DE-SC0025599 / U.S. Department of Energy (DOE) (https://doi.org/10.13039/100000015) N/A / Illinois Space Grant Consortium (ISGC) (https://doi.org/10.13039/100005738) 891744 / EC ∣ Horizon Europe ∣ Excellent Science ∣ HORIZON EUROPE Marie Sklodowska-Curie Actions (MSCA) (https://doi.org/10.13039/100018694) 1106171 / National Science Foundation (NSF) (https://doi.org/10.13039/100000001) 80NSSC24M0023 / National Aeronautics and Space Administration (NASA) (https://doi.org/10.13039/100000104) AST-1944985 / National Science Foundation (NSF) (https://doi.org/10.13039/100000001) 25501 / Villum Fonden (Villum Foundation) (https://doi.org/10.13039/100008398)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:001499280100001
- Scopus ID
- 2-s2.0-105007098846
- Other Identifier
- 991022055174904721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics